testsuites classification

[GNU Team]

I have a question regarding gcc testsuites.
How do I categorize them ?
After running the gcc 3.0 test suite on  gcc 2.95.3 (sh-coff-gcc)
I got following results.
 
GCC	PASS	      10077	
	FAIL	      4927	
	XPASS	      2	
	XFAIL	      78	
	UNRESOLVED	132	
	UNSUPPORTED	59	
	WARNINGS	23	
	ERRORS	3	


Now, is there any document which classifies these testsuites ?
ie. which tests must PASS and which may not pass ?
Or does it mean that compiler has 4500 bugs which must be fixed ?


Arati.